I have a Behringer PMP518M mixer (5 channel: 180 Watts) and two Behringer 400 Watt PA Speakers. I've been using it for only a few days for my band in which we only hook up a bass guitar and four mics into and today i had everything plugged in the corect place and when we went to play, no sound or anything came from any of the two speakers. But the lights on the mixer did show up, meaning that it was reading that it was picking us up. I made sure the volume was up and everything but still nothing. Then i went back to the basics to see if it would just play something on my I Pod out of the CD/MP3 Input and still nothing. But there is this quiet buzz noise that comes from the speaker. Any suggestions.?
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Those specs would be right - I have this same board but the amp was fried by a previous owner. I pulled the amp board out and tossed it and use the mixer now to drive an external amp. Great board.
This amp is rated at 1200W "peak", bridged into an 8ohm load. That would equate to about 900W RMS bridged into 8ohm or 450 per side into 4ohm loads per side.
You can't daisy chain all 4 speakers....impedance would be too low. You can run two of your 8ohm speakers per side - that results in a 4ohm load per side for the amp. That would give you amp delivery of 450W per side. Your speakers are rated to handle more than that so you're fine.
For the record.....you could run one speaker per side no problem....just lower power output.
Did you have the same speakers you test with at the store? If not, that is the problem. This unit will generate 400 watts a side when used on 4 ohm speakers, and a little over 200 watts a side with 8 ohm speakers and about 120 watts a side with 16 ohm speakers. For mics, the trim controls will be between 3 o'clock and full right. You set these using the PFL button with loudess vocal such that the indicator does not reach into the clipping. Do this for each channel. ALWAYS use balanced lines where possible. Use of unbalanced cables input results in a 6 Db loss. You will want to run the channel and main faders normally in the 80% range, like between -5 and 0 for BEST signal to noise ratio. There are good videos on You tube about mixer setup. If the speakers were not the ones tested with, your speakers may be the problem... I HOPE they are NOT consumer stereo speakers as you will soon smoke them with this mixer... the consumer speakers are very inefficient and you won't get much sound before blowing them up. If you spent less than $300 for EACH EV speaker new, it is UNLIKELY they are suitable. The suitable ones I found for 12 inch are around $600 each...hopefully these are the ones you have. There are less expensive brands. Frankly, if you want more sound, especially bass, I would go up to 15 inch speakers. These are probably the lowest end price wise to consider: http://www.musiciansfriend.com/pro-audio/behringer-b215xl-15-1000w-passive-pa-speaker Shop around, but stay with PA rated pro speakers as consumer ones just won't take it and eventually fail when used with these amps. ALSO be very careful if you use 1/4 inch speaker plugs as the SLEEVE of the A channel of this amp is the HOT, not the TIP of the jack... short the sleeve to something grounded and it is goodbye amp.
Well... you probably won't like this, but here is some info: In bridged mode, a different Speakon to speaker cable is required from only the B... it is wired differently and you can only use one of the plugs. The speaker or speaker system CANNOT be less than 8 ohms in bridged mode... this precludes using speakers in parallel or multiple speakers that are less than 16 ohm impedance... such speakers are NOT commonly available as most are either 4 or 8 ohm. There is a slide switch for bridged mode on the face of the mixer. Next thing you won't like... The 1200 Watts specification is PEAK power, NOT RMS... You can get 400 watts RMS per side USING 4 ohm speakers. If you use 8 ohm speakers, each of those will get 200 watts. I use this mixer myself and ALSO repair them. The voltage swing at the outputs is about +/-60 volts MAX (peak). This is about 40 volts RMS by the time the circuit LOSSES are taken into account. Across a 4 ohm speaker you get 10 amps times the 40 volts or 400 watts. Across an 8 ohm you get 5 amps or 200 watts. The voltage rails in the switching amp are +/-70 volts DC so these are reasonable values. Bridged mode just uses both sides of the amp driven in opposite directions for higher voltage out BUT you have to use no less than a single 8 ohm speaker so there is NO advantage to bridged mode power wise. IF YOU NEED more power, use extra speakers from an additonal amp driven by the 1/4 TRS mains output jacks OR use additonal POWERED speakers driven from the same jacks. Please read my tip about the hazard regarding the SLEEVE of the cahnnel A cable when using Speakon to 1/4 plug cables being the HOT and the tip being the cold for channel A. Ground the sleeve accidentally and goodbye channel A amp...
The PMP 6000 or 4000 depending on how many channels and effects you need is a good match.
READ THE SPECS... the speakers are capable of 250 Watts RMS (not 1000 as that is PEAK) power... like the ridiculous claims of 4 Hp for shop vacuums that run on 120 volts.
The 4000 and 6000 will generate about 250 Watts per side into 8 ohm speakers so is well matched for the B215XL speakers... by matched we mean the speakers are not likely to get blown out.
Connect a 500 Watt per side amp to the speakers and you will be buying replacements in short order.
ALSO realize how much sound you will get from the speakers.. they will cover a 2000 square foot venue fairly well. I suggest you get a sound level meter so you have a metric of levels when you are using the system. If you need more sound, you can add a second set of the speakers in parallel.
The answer to your question is NO, there is NOT an internal adjustment.
For many mics the trim is used full clockwise. Some higher output mics I use the trims are run at 3 o'clock which is mostly turned up. This is NORMAL for most mixers. If you don't have enough mic gain relative to other inputs, the fault is balancing the other inputs down and using higher setting on your MAIN slider.
If you use 8 ohm speakers then you can expect to get about 200 Watts of audio per side with this amp. You can get about 400 Watts RMS (600 Watts peak) using 4 ohm speakers.
The efficiency of the speakers makes a lot of difference in the sound level output/
The speakers are 8 ohm so you can probably get near the 400 Watt per side when connected to this mixer. You don't need bridge mode to get this and I would recommend not using it anyway. Whatever you do make sure the speakers don't get disconnected when running at high volumes as you will arc out the amp in the mixer... I know this as I fix them... I have two PMP5000's that I repaired. Lots of work to repair...
The feedback is NOT the fault of the mixer or speakers but instead of something picking up sound from the speakers and sending back to the mixer.
The mic must be well in back of the speakers (say at least 10 feet) to avoid this or you need to use anti-feedback hardware to avoid the problem or highly directional close talking mics. Reverberation off walls can also get back to mics and cause problem. I was able to use a wireless Peavey mic which seemed to disrupt the phase enough to never get into an oscillation even when in front of the speakers.